Direct bit loading with reduced complexity and overhead for precoded OFDM systems

Fatma Kalbat, Arafat Al-Dweik, Youssef Iraqi, Husam Mukhtar, Bayan Sharif, George K. Karagiannidis

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


This paper considers the bit loading problem for communication systems that utilize orthogonal frequency division multiplexing (OFDM) in conjunction with precoding (POFDM) or time-domain interleaving (IOFDM). In particular, we propose a new bit loading algorithm for P/I-OFDM that has substantially higher effective throughput and less computational complexity, when compared to bit loading in conventional OFDM systems. The obtained results show that the effective throughput of P/I-OFDM can be more than fourfold the conventional OFDM while the complexity is less than 1.5%. Moreover, the results show that the peak-to-average power ratio (PAPR) properties of the considered systems are preserved under the adaptation process.

Original languageBritish English
Article number8701660
Pages (from-to)7169-7173
Number of pages5
JournalIEEE Transactions on Vehicular Technology
Issue number7
StatePublished - Jul 2019


  • adaptive modulation
  • Bit loading
  • OFDM
  • PAPR
  • precoding
  • walsh hadamard


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